chore(repo-health): add issue template

Author: however-yir

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,29 @@
+name: Bug report
+description: Report a reproducible issue
+title: "[Bug]: "
+labels:
+  - bug
+body:
+  - type: textarea
+    id: summary
+    attributes:
+      label: Summary
+      description: What happened and what did you expect?
+    validations:
+      required: true
+  - type: textarea
+    id: steps
+    attributes:
+      label: Steps to Reproduce
+      description: Include exact steps, inputs, and environment.
+      placeholder: |
+        1. Go to ...
+        2. Run ...
+        3. Observe ...
+    validations:
+      required: true
+  - type: input
+    id: version
+    attributes:
+      label: Version/Commit
+      description: Affected version, tag, or commit SHA.